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首页> 外文期刊>Journal of Applied Polymer Science >THE INHIBITION OF BUTYL ACRYLATE BY P-METHOXYPHENOL
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THE INHIBITION OF BUTYL ACRYLATE BY P-METHOXYPHENOL

机译：对甲氧基苯酚对丙烯酸丁酯的抑制作用

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摘要

The lengths of polymerization induction periods for butyl acrylate (BA) in the presence of air were measured at temperatures from 54 to 122.5 degrees C. The kinetics of MEHQ and oxygen consumption at 80 and 100 degrees C are characterized by their own induction periods followed by sharply accelerated rates immediately prior to the BA polymerization. It is proposed that these phenomena are consistent with an ''intrinsic'' BA radical formation rate that is extremely slow compared to the ultimate rate of radical production from the decomposition of peroxides. These oligomeric peroxides build up during the induction period and, at its end, rapidly decompose with a resulting ''radical cascade effect,'' causing the accelerated inhibitor and oxygen consumption followed rapidly by BA polymerization. Thus, confirmation that a supply of BA has a normal MEHQ concentration may not be sufficient to ensure its stability. Strict adherence to the storage conditions and shelf life recommended by the supplier(6) is absolutely vital to storage safety, especially because uncontrolled polymerization of BA has the potential to be violent (polymerization exotherm rates higher than 1000 degrees C/min were observed). (C) 1996 John Wiley & Sons, Inc. [References: 7]
机译：在54至122.5摄氏度的温度下测量了在空气中丙烯酸丁酯（BA）的聚合诱导期的长度。在80和100摄氏度下，MEHQ和耗氧量的动力学特征在于它们各自的诱导期，然后是在BA聚合之前立即大幅提高了速率。提出这些现象与“固有的” BA自由基形成速率相一致，与过氧化物分解产生自由基的最终速率相比，该速率极慢。这些低聚的过氧化物在诱导期逐渐积累，并在其结束时迅速分解，产生“自由基级联效应”，导致加速的抑制剂和氧气消耗，然后迅速进行BA聚合。因此，确认BA的供应具有正常的MEHQ浓度可能不足以确保其稳定性。严格遵守供应商（6）推荐的储存条件和保质期对于储存安全至关重要，尤其是因为BA不受控制的聚合反应可能会剧烈（观察到聚合放热速率高于1000℃/ min）。 （C）1996 John Wiley＆Sons，Inc. [参考：7]

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